[PATCH 23/40] lib: add codetag reference into slabobj_ext
From: Suren Baghdasaryan <surenb@google.com>
Date: 2023-05-01 17:00:00
Also in:
cgroups, linux-arch, linux-doc, linux-fsdevel, linux-iommu, linux-mm, lkml
Subsystem:
control group - memory resource controller (memcg), library code, memory management, slab allocator, the rest · Maintainers:
Johannes Weiner, Michal Hocko, Roman Gushchin, Shakeel Butt, Andrew Morton, Vlastimil Babka, Harry Yoo, Linus Torvalds
To store code tag for every slab object, a codetag reference is embedded into slabobj_ext when CONFIG_MEM_ALLOC_PROFILING=y. Signed-off-by: Suren Baghdasaryan <surenb@google.com> Co-developed-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> --- include/linux/memcontrol.h | 5 +++++ lib/Kconfig.debug | 1 + mm/slab.h | 4 ++++ 3 files changed, 10 insertions(+)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 5e2da63c525f..c7f21b15b540 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h@@ -1626,7 +1626,12 @@ unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, * if MEMCG_DATA_OBJEXTS is set. */ struct slabobj_ext { +#ifdef CONFIG_MEMCG_KMEM struct obj_cgroup *objcg; +#endif +#ifdef CONFIG_MEM_ALLOC_PROFILING + union codetag_ref ref; +#endif } __aligned(8); static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index d3aa5ee0bf0d..4157c2251b07 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug@@ -968,6 +968,7 @@ config MEM_ALLOC_PROFILING select CODE_TAGGING select LAZY_PERCPU_COUNTER select PAGE_EXTENSION + select SLAB_OBJ_EXT help Track allocation source code and record total allocation size initiated at that code location. The mechanism can be used to track
diff --git a/mm/slab.h b/mm/slab.h
index bec202bdcfb8..f953e7c81e98 100644
--- a/mm/slab.h
+++ b/mm/slab.h@@ -418,6 +418,10 @@ int alloc_slab_obj_exts(struct slab *slab, struct kmem_cache *s, static inline bool need_slab_obj_ext(void) { +#ifdef CONFIG_MEM_ALLOC_PROFILING + if (mem_alloc_profiling_enabled()) + return true; +#endif /* * CONFIG_MEMCG_KMEM creates vector of obj_cgroup objects conditionally * inside memcg_slab_post_alloc_hook. No other users for now.
--
2.40.1.495.gc816e09b53d-goog